One thing that you should remember about the e-cig and the vape is they are both used for vaping purposes. One difference is they look different. The e-cig usually looks like a cigarette so that people who are using it will feel like they are only using a cigarette in order to satisfy their craving. The vape can look a bit different.
There are some vapes that will come with drippers while there are also some that will come with tanks. The dripper would require the juice to be placed every now and then, depending on how the person will smoke. The tank will allow the person to vape for as long as there is vape juice available.